80 for (n = 0; n < 6; n++) {
99 ptrdiff_t linesize = frame->
linesize[0];
117 const int64_t qscale = (215 - 2*
quant)*5;
126 void *
data,
int *got_frame,
130 int buf_size = avpkt->
size;
131 const uint8_t *buf_end = buf+buf_size;
158 (buf_end - buf) / 4);
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
static av_cold int tqi_decode_init(AVCodecContext *avctx)
av_cold void ff_mpeg12_init_vlcs(void)
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
static av_cold int init(AVCodecContext *avctx)
av_cold void ff_blockdsp_init(BlockDSPContext *c, AVCodecContext *avctx)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
static void tqi_idct_put(AVCodecContext *avctx, AVFrame *frame, int16_t(*block)[64])
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
static int tqi_decode_mb(TqiContext *t, int16_t(*block)[64])
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
static void tqi_calculate_qtable(TqiContext *t, int quant)
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
static av_cold int tqi_decode_end(AVCodecContext *avctx)
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
bitstream reader API header.
void ff_ea_idct_put_c(uint8_t *dest, ptrdiff_t linesize, int16_t *block)
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
void(* clear_blocks)(int16_t *blocks)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
int flags
AV_CODEC_FLAG_*.
const char * name
Name of the codec implementation.
av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation, enum idct_permutation_type perm_type)
ScanTable intra_scantable
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
uint8_t idct_permutation[64]
IDCT input permutation.
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
const uint16_t ff_inv_aanscales[64]
main external API structure.
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Rational number (pair of numerator and denominator).
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
const uint16_t ff_mpeg1_default_intra_matrix[256]
const uint8_t ff_zigzag_direct[64]
AAN (Arai, Agui and Nakajima) (I)DCT tables.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
int ff_mpeg1_decode_block_intra(GetBitContext *gb, const uint16_t *quant_matrix, uint8_t *const scantable, int last_dc[3], int16_t *block, int index, int qscale)
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
common internal api header.
uint16_t intra_matrix[64]
unsigned int bitstream_buf_size
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
static int tqi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
This structure stores compressed data.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators...